package com.itheima.mapper;

import com.itheima.pojo.Dept;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface DeptMapper {
    /**
     * 查询部门列表
     *
     * @return
     */
    //方式一：手动映射
    /*@Results({
        @Result(column = "create_time", property = "createTime"),
        @Result(column = "update_time", property = "updateTime")
    })*/
    //方式二：起别名，让别名与实体类的属性名相同
    //@Select("select id,name,create_time createTime,update_time updateTime from dept order by update_time desc")
    @Select("select id,name,create_time,update_time from dept order by update_time desc")
    List<Dept> list();

    @Delete("delete from dept where id=#{id}")
    int deleteById(Integer id);

    /**
     * 新增部门
     * @param dept
     */
    @Insert("insert into dept(name,create_time,update_time) values(#{name},#{createTime},#{updateTime})")
    int insert(Dept dept);

    /**
     * 通过id查询部门信息
     * @param id
     * @return
     */
    @Select("select id,name,create_time,update_time from dept where id=#{id}")
    Dept selectById(Integer id);

    /**
     * 更新部门
     * @param dept
     */
    @Update("update dept set name=#{name},update_time=#{updateTime} where id=#{id}")
    void updateById(Dept dept);
}
